The easiest way
to think about this is that diode lasers are great at cutting and engraving organic materials and plastic, while fiber lasers work better on metals.
A diode laser, or commonly known as blue light laser, typically operates at a wavelength around 445nm. It is really effective on wood, paper bags and packaging, leather, fabrics and acrylic. It is not good on metal.
A fiber laser, commonly known as an infrared or IR laser, uses fiber-optic cables that are mixed with rare-earth elements. It is invisible to the naked eye and hence called infrared. It operates at 1064nm and is specifically designed for metal engraving.
All xTool F-Series laser engravers are duo-laser machines, meaning they have both a diode and a fibre laser built in. You’ll see it in their software referred to as Blue Light and IR lasers.
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